Fink's conjecture on ample numbers avoiding the first primes

Let a(n)a(n) denote the recursive divisor function, and call a positive integer nn ample when a(n)>na(n)>n. Let p1,p2,p_1,p_2,\ldots be the primes in increasing order. Fink's conjecture. For every positive integer kk, there exists an ample number not divisible by any of p1,,pkp_1,\ldots,p_k. This parallels the corresponding known property of abundant numbers, while odd ample numbers and examples avoiding the first prime have been found; the conjecture remains open.

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Primary source

Thomas Fink, “Recursively abundant and recursively perfect numbers”, arXiv:2008.10398 (2020).

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